Just did about 1200 miles in my nearly 2 months old G05 30d, last week trip to south of france and back using the tunnel. What a fantastic car! I'm glad I packed up on pretty much all the tech (apart from the massaging seats
)
Basically on motorway the car drives itself. just tucked my knee against the wheel, barely touching, and you can just let it do it's thing. Apart from changing lane now and then to pass a lorry, that's about it really. Very relaxing. Car is super quiet, super comfy. Tech works very well (a few little bugs here and there...). One thing of note is the satnav is pretty much useless in france; it keeps trying to use "D" roads, single tracks etc etc instead of bigger ones. Wasted a couple of hours on part of the trip before I figured it out.
Also did a bit of rallye stage driving in the small roads around Cahors. This is such a monster to be able to move like that with such weight. My friend calls it the "Sherman tank BMW"...
Overall on the trip, mostly in "Adaptive" but with a bit of "Sport" and mostly doing 133km/h on motorways, I did 40mpg with a loaded car. In fact, a packed full car especially on the way back